//
//  OAuthViewController.swift
//  云Sir的微博
//
//  Created by 赵云 on 15/10/10.
//  Copyright © 2015年 itcast. All rights reserved.
//

import UIKit
import SVProgressHUD

class OAuthViewController: UIViewController, UIWebViewDelegate {

    //MARK: 搭建界面
    private lazy var webview = UIWebView()
 
    
    override func loadView() {
        
        view = webview
        
        webview.delegate = self
        
        title = "新浪微博"
        
        navigationItem.rightBarButtonItem = UIBarButtonItem(title: "关闭", style: UIBarButtonItemStyle.Plain, target: self, action: "close")
        
    }
    //关闭界面
    func close(){
        SVProgressHUD.dismiss()
        dismissViewControllerAnimated(true, completion: nil)
    }
    
    
    override func viewDidLoad() {
        super.viewDidLoad()

        //加载授权界面
        webview.loadRequest(NSURLRequest(URL: NetworkTools.sharedTools.oauthUrl()))
        print(NetworkTools.sharedTools.oauthUrl())
    }
    
    
    // MARK: -UIWebViewDelegate
    func webViewDidStartLoad(webView: UIWebView) {
        // 小转轮
        SVProgressHUD.show()
    }
    
    func webViewDidFinishLoad(webView: UIWebView) {
        SVProgressHUD.dismiss()
    }
    
    /**
    1.如果请求的url中包含回调的地址,需要判断参数,否则继续加载
    2.判断请求的参数中,包含code,可以从请求的url中获得请求码
        */

    func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
        //拼接完整的url
        let urlString = request.URL!.absoluteString
        //判断是否包含回调地址
        if !urlString.hasPrefix(NetworkTools.sharedTools.redirectUri){
            return true
        }
        
        //判断请求的参数中,
        if let query = request.URL?.query where query.hasPrefix("code=") {
            
            print("获取授权码")
            let code = query.substringFromIndex("code=".endIndex)
            
            print(code)
            // 换取token
            loadAccessToken(code)
            
        }else{
            close()
        }
        
        return false
}
    private func loadAccessToken(code: String) {
        NetworkTools.sharedTools.loadAccessToken(code) { (result, error) -> () in
            if error != nil || result == nil {
                self.netError()
                return
            }
            
            // 字典转模型
            // 1. 用 token 获取的信息创建用户账户模型
            // 2. 异步加载用户信息, 保存用户信息(模型中完成)
            UserAccount(dict: result!).loadUserInfo({ (error) -> () in
                if error != nil {
                    self.netError()
                    return
                }
                
               //发送通知
                NSNotificationCenter.defaultCenter().postNotificationName(ZYRootViewControllerSwicthNotification, object: false)
            })
        }
    }
    
    /// 网络出错处理
    private func netError() {
        SVProgressHUD.showInfoWithStatus("您的网络不给力")
        
        // 延时一段时间再关闭
        let when = dispatch_time(DISPATCH_TIME_NOW, Int64(1 * NSEC_PER_SEC))
        dispatch_after(when, dispatch_get_main_queue()) {
            self.close()
        }
    }
   
}
